To use the MediaPlayer server control, you reference a media source file and select a built-in skin. The following example shows the declarative markup for a MediaPlayer server control with property settings. The MediaPlayer control creates the Sys.UI.Silverlight.MediaPlayer client script class (based on the model used in the ASP.NET AJAX Extensions) that provides a JavaScript programming model to control the client player. By default, the Silverlight client player is the Silverlight 1.0 browser plug-in. For more information, see ASP.NET MediaPlayer Server Control.